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Defining moments from 2018 F1 season

(CNN)The 2018 Formula One season has provided fans with a bit of everything; flared tempers, spectacular crashes and some truly brilliant driving.Much of that brilliance has come in the shape of Lewis Hamilton, whose fifth world title made him only the third driver in history to reach that landmark.Ferrari and Sebastian Vettel, meanwhile, will be left thinking what might have been. Despite boasting the faster car for much of the year, a catalog of errors allowed Mercedes and Hamilton to secure another constructors'-drivers' title double.HaloWhile its introduction was met with a fair amount of skepticism, F1's new "Halo" device proved its worth in 2018.Built around the cockpit to protect drivers from flying debris, the titanium structure hi ...